（）对内与主控系统相连，对外与现场设备相连，主要由采集结合电路、动态驱动设备和继电器控制电路组成。
At 0845，you are approaching the entrances to Thimble Shoal Channel. What channel must you use?（） ["The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters)，and you are not a passenger vessel","The South Auxiliary Channel or Thimble Shoal Channel，but you must remain on the right hand side of the main channel","The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12"","You are not permitted to use any of the channels，but must remain outside the buoyed channel line"]
广告主自行或者委托他人设计、制作、发布广告，应当具有或者提供真实、合法、有效的下列哪些证明文件（） ["营业执照以及其他生产、经营资格的证明文件","广告主法定代表人的身份证明","质量检验机构对广告中有关商品质量内容出具的证明文件","确认广告内容真实性的其他证明文件"]
钢板的规格用（）表示。 ["厚度×宽度×长度的厘米数","宽度×厚度×长度的厘米数","厚度×宽度×长度的毫米数","宽度×厚度×长度的毫米数"]
喷雾水枪的控制面积与喷雾水枪控制周长，喷雾水枪的喷雾宽度成正比。
通过计算得出在250km/h高速运行状态下，列车安全追踪间隔距离约（）m。
